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(No 191100181.) I 2 Shee1;s-Sheet 1. 7L. DURAND. Gas Engine.

No. 232,808. 8 Patented'Oct. 5,1880.

Fig-1;

NVPETERS, PMOTOMYHOGRAPHER, WASHINGYON. D C.

2 Sheets--Sheet 2.

(No Model.)

L. DURAND, Gas Engine.

No. 232,808. Patented Oct. 5,1880.

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Units arts rider.

arrar LOUIS DURAND, OF QUEBEC, PROVINCE OF QUEBEC, CANADA, ASSIGN-f OR OF ONE-HALF OF HIS RIGHT TO DEXTER H. WALKER, OF NEW YonK, N. Y.

GAS-ENGINE.

SPECIFICATION forming part of Letters Patent No. 232,808, dated. October 5, 1880.

Application filed May 19, 1880.

To all whom it may concern:

Be it known that I, LOUIS DURAND, of Quebec, in the Province of Quebec, Dominion of Canada, have invented certain new and useful Improvements in GasEngincs; and I hereby declare the same to be fully, clearly, and exactly described as follows, reference being had to the accompanying drawings, in which Figure 1 is a horizontal sectional view of the engine. Fig. 2 is a side elevation of the same, partly in section. Fig.3 is a transverse vertical sectional view of the same. Fig. at is a central sectional view of the governor, and Fig. 5 is a similar view of the gas-valve.

My invention relates to what are technically known as gas-engines, or that class of motors in which the piston is driven back and forth in the cylinder by the explosion within the same of a combustible mixture of gas and air; and it has for its object to simplify the construction of the device, and, incidentally, to increase its efficiency. These results are secured by means of certain features of construction and combinations of parts, as hereinafter explained.

In the accompanying drawings, A is the cylinder, in which reciprocates a piston, B, of the usual construction. The cylinder is provided With suitable inlet and exhaust ports g g at either end, (the engine being double-acting,) and a valve, 0 O, having ports 9 g, reciprocates past the face of the cylinder, being actuated by a rod, 0, attached to an eccentric on the main shaft, which latter also carries a suitable fly-wheel.

D D are a pair of disks, that are pivoted at the sides of the cylinder, and have openings and orifices c c, as shown, which register with the air and gas ports a b a b. These disks turn in grooves in a piece, O, and are caused to oscillate or rotate back and forth by means of arms I I, that are attached to a rod, 43 t, which is connected with a crank or eccentric on the main shaft. A right and left threaded sleeve, 2', connects the parts of the rods, and admits of the regulation of the throw of the disks.

Through the frame-plate P are inserted the gas-pipes E, whose orifices are opened and closed by the disks D D.

(No model.)

E E are cylindrical valves, that oscillate or rotate within boxes at the ends of the cylinder, and contain each a burner, F. The pivot-rods of the valves E E carry segmental gears, that mesh with similar gears on the ends of the 5 arms I, so that the valves E E and the disks D D rotate together. These valves open and close ports ff, which communicate with the interior of the cylinder, and opposite each valve is a burner, M, which is permanently lit.

In operation, as the piston D recedes from the end of the cylinder a charge of air enters by the port a, and ofgas by the port b and orifices c in the disk D. When the proper charge has entered the cylinder, which charge is regulated as desired by the throw of the disks, the valve E turns so as to bring its opening opposite the port f, leading to the cylinder. The jet F ignites the contents of the cylinder, and the explosion drives the piston forward. The jet is, of course, extinguished. by the explosion, but it is reignited as the rotation of the valve E brings its opening opposite an orifice in the casing in front of the burner M. As the piston reaches the end of its stroke the throw of the valve O causes its opening to register with the exhaust-port, and 011 the return stroke the contents of the cylinder are exhausted through the port g.

The entrance of gas and air and the cxplo- 8o sion take place at each end of the cylinder, the mechanism and its operation being exactly similar to that just described.

N ow, inasmuch as the relative proportions of gas and air that enter the cylinder through the disks D D is fixed and constant so far as the disks are concerned, be the absolute quantity great or small, and as the force of the explosion depends upon the relative proportions,

a mechanism for throttling the gas-supply 9o automatically is a practical necessity. To this end I have devised the governor shown in Fig.

4. It consists of a ring, J,'which is mounted on a shaft, R, that carries a segment-pinion,

T, within a hollow shaft, Q, as shown, the 9 5 shaft Q, being driven by means of a belt led from a pulley on the main shaft of the engine.

A rod, U, within the hollow shaft, has a rack that engages with the segment-pinion T, and

is normally retracted by a spring, V, whose I00 tension is regulated by a thumb-screw, r. The other end of the rod U is connected with the gas-inlet cook or valve.

As the speed of the engine increases the ring J tends to take a position in which its plane is at right angles to the shaft Q, in which case the pinion T causes the rod U to travel longitudinally within the shaft Q a'nd'against the tension of the spring 7:, incidentally partly closing the gas-valve. As the speed slackens the spring returns the valve to its first position.

The pipe 1, shown in Fig. 5, is connected with the gas-supply, and leads into a casing, L, in which revolves a box, X, turned by a key attached to the polygonal shank x. This constitutes the cock for cutting off the gasby hand altogether. The outlet-pipe from the'box X contains a cut-off, Y, which is rotated by the governor-rod U, thereby automatically regu lating the gas-supply.

What I claim is- 1. In a gas-engine, adouble-actin g cylinder having air inlet and exhaust ports, as -described, a slide -valve reciprocating against the face of the cylinder, and a pair of disks having gas and air ports and actuated by an eccen trio-rod from the main shaft, as described.

2. In a gas-engine, a rotating ignition-valve containing a burner and having an orifice which is made to register alternately with the firingport and with a reignitionV-burner, all constructed and arranged as set forth.

3. In a gas-engine, a pair of ignition-valves located atthe ends ofthe cylinder'and a pair of ported disks, the disks and valves being geared together and adapted to admit the charge of air and gas, and to fire the same, as set forth.

4. In combination with the cylinder A, having ports a b a b, the valve 0 and rotating disks D D, as described.

5. In combination with the cylinder having portsf f the ignition'valves E E and per- -manent burners M M, as set forth.

6. In combination with the cylinder and gassupply, the rod U, segment T, pivoted ring J, 'and spring V, as set forth.

7. In combination with the cylinder, gassupply, and governor, the casin g L, box X,

.and cut'oif Y, as described.

LOUIS DURAND.

Witnesses J 0s. 0. HUGHES,

JOSEPH M. CLARK. 

